4-isopropylphenyl diphenyl phosphate, 1.2ml x 50ug/ml, toluene

15N3-Atrazine-desethyl, 100 µg/ml, Acetonitrile,

Nitrogen Calibration Set-Low Boiling Solvents Units: 1x1mL ampoules or 10mL screw-capped bottle Nitrogen introduced using Pyridine Catalogue No. Concentration Matrix: isooctane mg/kg (ppm) S-4140-0 Blank S-4140-03 0.3

Methyl sorbate